<template>
  <div id="detail">
    <detail-nav-bar @titleClick="titleClick" class="detail-nav" ref="nav"></detail-nav-bar>
    <scroll class="content" ref="scroll" :probe-type="3" @scroll="contentScroll">
      <detail-swiper :top-images="topImages"></detail-swiper>
      <detail-base-info :goods="goods"></detail-base-info>
      <detail-shop-info :shop="shop"></detail-shop-info>
      <detail-goods-info :detail-info="detailInfo" @imageLoad="imageLoad"></detail-goods-info>
      <detail-param-info ref="param" :param-info="paramInfo"></detail-param-info>
      <detail-comment-info ref="comment" :comment-info="commentInfo"></detail-comment-info>
      <goods-list ref="recommend" :goods="recommends"></goods-list>
    </scroll>
    <back-top @click.native="backClick" v-show="isShowBackTop"></back-top>

    <detail-bottom-bar @addCart="addToCart"></detail-bottom-bar>
  </div>
</template>

<script>
import DetailNavBar from "./childComps/DetailNavBar";
import DetailSwiper from "./childComps/DetailSwiper";
import DetailBaseInfo from "./childComps/DetailBaseInfo";
import DetailShopInfo from "./childComps/DetailShopInfo";
import DetailGoodsInfo from "./childComps/DetailGoodsInfo";
import DetailParamInfo from "./childComps/DetailParamInfo";
import DetailCommentInfo from "./childComps/DetailCommentInfo";
import DetailBottomBar from "./childComps/DetailBottomBar";

import Scroll from "components/common/scroll/Scroll";
import GoodsList from "components/content/goods/GoodsList";

import { debounce } from "common/utils";
import { itemListenerMixin, backTopMixin } from "common/mixin";

import {
  getDetail,
  Goods,
  Shop,
  GoodsParam,
  getRecommend
} from "network/detail";

export default {
  name: "Detail",
  components: {
    DetailNavBar,
    DetailSwiper,
    DetailBaseInfo,
    DetailShopInfo,
    DetailGoodsInfo,
    DetailParamInfo,
    DetailCommentInfo,
    DetailBottomBar,
    Scroll,
    GoodsList
  },
  mixins: [itemListenerMixin, backTopMixin],
  data() {
    return {
      iid: null,
      topImages: [],
      goods: {},
      shop: {},
      detailInfo: {},
      paramInfo: {},
      commentInfo: {},
      recommends: [],
      itemImgListener: null,
      themeTopYs: [],
      getThemeTopY: null,
      currentIndex: 0
    };
  },
  created() {
    // 1.保存传入的iid
    this.iid = this.$route.params.iid;

    // 2.根据iid请求详情数据
    getDetail(this.iid).then(res => {
      // 获取顶部的图片轮播数据
      console.log(res);
      const data = res.result;
      this.topImages = data.itemInfo.topImages;
      // 获取商品信息
      this.goods = new Goods(
        data.itemInfo,
        data.columns,
        data.shopInfo.services
      );

      // 获取店铺信息
      this.shop = new Shop(data.shopInfo);

      // 保存商品的详情数据
      this.detailInfo = data.detailInfo;

      // 获取商品参数信息
      this.paramInfo = new GoodsParam(
        data.itemParams.info,
        data.itemParams.rule
      );

      // 获取商品评论信息
      if (data.rate.cRate !== 0) {
        this.commentInfo = data.rate.list[0];
      }

      // this.$nextTick(() => {
      //   this.themeTopYs = [];

      //   this.themeTopYs.push(0);
      //   this.themeTopYs.push(this.$refs.param.$el.offsetTop);
      //   this.themeTopYs.push(this.$refs.comment.$el.offsetTop);
      //   this.themeTopYs.push(this.$refs.recommend.$el.offsetTop);

      //   console.log(this.themeTopYs);
      // });
    });

    // 3.请求推荐数据
    getRecommend().then(res => {
      this.recommends = res.data.list;
    });

    // 4.给getThemeTopY赋值(this.themeTopYs进行防抖)
    this.getThemeTopY = debounce(() => {
      this.themeTopYs = [];

      this.themeTopYs.push(0);
      this.themeTopYs.push(this.$refs.param.$el.offsetTop);
      this.themeTopYs.push(this.$refs.comment.$el.offsetTop);
      this.themeTopYs.push(this.$refs.recommend.$el.offsetTop);

      console.log(this.themeTopYs);
    }, 100);
  },
  mounted() {},
  destory() {
    this.$bus.$off("itemImgLoad", this.itemImgListener);
  },
  methods: {
    imageLoad() {
      // this.$refs.scroll.refresh();
      this.newRefresh();

      this.getThemeTopY();
    },
    titleClick(index) {
      // console.log(index);
      this.$refs.scroll.scrollTo(0, -this.themeTopYs[index], 100);
    },
    contentScroll(position) {
      // 1.获取y值
      const positoinY = -position.y;

      // 2.positionY和主题的y值进行对比
      let length = this.themeTopYs.length;
      for (let i = 0; i < length; i++) {
        if (
          this.currentIndex !== i &&
          ((i < length - 1 &&
            positoinY >= this.themeTopYs[i] &&
            positoinY < this.themeTopYs[i + 1]) ||
            (i === length - 1 && positoinY >= this.themeTopYs[i]))
        ) {
          this.currentIndex = i;
          // console.log(this.currentIndex);
          this.$refs.nav.currentIndex = this.currentIndex;
        }
      }

      // 是否显示回到顶部
      this.listenShowBackTop(position);
    },
    addToCart() {
      // 获取购物车中需要展示的信息
      const product = {};
      product.image = this.topImages[0];
      product.title = this.goods.title;
      product.desc = this.goods.desc;
      product.price = this.goods.realPrice;
      product.iid = this.iid;

      // 将商品添加到购物车
      // this.$store.commit("addCart", product);
      this.$store.dispatch("addCart", product).then(res => {
        this.$toast.show(res, 1500);
      });
    }
  }
};
</script>

<style scoped>
#detail {
  position: relative;
  z-index: 9;
  background-color: #fff;
}

.detail-nav {
  position: relative;
  z-index: 9;
  background-color: #fff;
}

.content {
  height: calc(100vh - 44px - 49px);
}
</style>